Weather & Climate in Koosharem, UT

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Koosharem has a cool climate with an average annual temperature of 45°F (7°C). Winters average 25°F in January while summers reach 66°F in July. The area gets 330 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 10.1 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 6,936 feet.

Temperature

25°F Jan (-4°C) 66°F Jul (19°C)

Annual Average	44.8°F
	17% below US avg
January Average	25°F (-4°C)
July Average	66°F (19°C)
Sunny Days	330 days/yr

Geography

Elevation	6,936 ft (2,114 m)
Area	0.9 sq mi (2.2 km²)
Population Density	350/sq mi
Coordinates	38.5134°N, 111.8819°W
Timezone	America/Denver
County	Sevier County County
Nearest Airport	Cedar City Regional (CDC) 87 miles away

Precipitation & Snow

Annual Rainfall 10.1"

73% below US avg

Wettest Month (Aug) 1.77"

Driest Month (Jun) 0.91"

Air Quality

AQI Median	41.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	22.7 / 100
Social Vulnerability	13.8 / 100
Community Resilience	56.1 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Relatively Low
Wildfire	Relatively Low
Flood	Very Low
Hail	Very Low
Strong Wind	Very Low
Heat Wave	Very Low
Winter Weather	Relatively Moderate
Lightning	Relatively Moderate
Ice Storm	Very Low
Drought	Relatively Low
Cold Wave	Very Low
Landslide	Relatively Low
Volcano	Very Low
Avalanche	Relatively Moderate

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

869 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.

Apr 20, 1991	19 km SE of Minersville, Utah	M4.6	93 km	10 km
Jan 3, 2011	10 km NW of Circleville, Utah	M4.6	50 km	11 km
Jul 29, 2024	24 km S of Brian Head, Utah	M4.5	144 km	20 km
Jan 2, 1998	10 km ESE of Beaver, Utah	M4.4	64 km	12 km
Jun 24, 1992	30 km WSW of Emery, Utah	M4.3	42 km	5 km
Apr 17, 2003	6 km SSW of Levan, Utah	M4.2	110 km	1 km
Jun 29, 1992	12 km WNW of Cedar City, Utah	M4.2	144 km	-3 km
Apr 12, 2012	16 km NNE of Bryce Canyon City, Utah	M4.2	80 km	15 km
Jun 29, 1992	12 km WNW of Cedar City, Utah	M4.2	146 km	7 km
Jul 19, 2001	31 km NNE of Fremont, Utah	M4.2	39 km	7 km
Jun 29, 2014	6 km SE of Spring City, Utah	M4.2	110 km	9 km
Jan 4, 2010	8 km S of Cedar City, Utah	M4.1	145 km	9 km
Oct 22, 1999	20 km SE of Minersville, Utah	M4.1	88 km	6 km
Jul 4, 2015	Utah	M4.1	90 km	3 km
Apr 14, 2019	28 km W of Kanosh, Utah	M4.1	82 km	1 km
Feb 20, 2019	8 km SW of Kanosh, Utah	M4.0	59 km	8 km
Sep 6, 1994	12 km SSW of Circleville, Utah	M4.0	63 km	6 km
Jan 26, 1991	22 km SE of Escalante, Utah	M4.0	106 km	22 km
Feb 23, 2001	12 km SW of Kanosh, Utah	M4.0	62 km	2 km
Jan 30, 1998	19 km NNW of Panguitch, Utah	M4.0	81 km	7 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

27 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 1 injury.

Date	Rating	Distance	Path	Fatalities
Sep 8, 2002	EF2	87 km	2.7 mi	0
Nov 2, 1967	EF2	71 km	0.1 mi	0
Jun 16, 1955	EF2	80 km	2.7 mi	0
Sep 22, 2016	EF1	90 km	0.8 mi	0
Apr 4, 1993	EF1	78 km	0.1 mi	0
Mar 31, 1978	EF1	71 km	0.5 mi	0
Apr 19, 1970	EF1	26 km	1.5 mi	0
Aug 28, 1964	EF1	71 km	0.1 mi	0
Aug 7, 1957	EF1	49 km	1.5 mi	0
Aug 26, 2016	EF0	92 km	0.3 mi	0
Sep 12, 2002	EF0	99 km	0.1 mi	0
Sep 8, 2002	EF0	69 km	0.2 mi	0
Sep 4, 2001	EF0	100 km	5.0 mi	0
Sep 8, 2000	EF0	91 km	2.0 mi	0
May 28, 1996	EF0	99 km	0.2 mi	0
May 21, 1992	EF0	88 km	0.3 mi	0
Sep 7, 1991	EF0	62 km	0.1 mi	0
Jun 7, 1989	EF0	96 km	0.2 mi	0
Aug 19, 1984	EF0	11 km	0.1 mi	0
Aug 15, 1984	EF0	77 km	0.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Black Rock Desert (74 km).

Name	Type	Elevation	Last Eruption	Distance
Black Rock Desert	Volcanic field	1,800 m (5,906 ft)	1290	74 km
Markagunt Plateau	Volcanic field	2,840 m (9,318 ft)	1050	125 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: MILFORD FLAT (348,772 acres, 2007).

Year	Name	Acres Burned	Distance
2007	MILFORD FLAT	348,772	77 km
2002	SANFORD	81,854	69 km
1996	SORENSON COMPLEX (SOUTH TWIN PEAKS)	46,576	63 km
2010	TWITCHELL CANYON	42,956	52 km
1986	TWINPEAKS	34,633	75 km
2006	DOG VALLEY	28,992	63 km
1996	ADELAIDE COMPLEX (ADALAIDE)	15,638	47 km
1996	CUNNINGHAM	14,866	69 km
2007	GREENVILLE	13,043	83 km
1995	LAVA RIDGE	12,391	74 km
2022	HALFWAY HILL	12,145	54 km
1996	HONEY BOY	11,113	87 km
1987	NEGRO MAG	10,608	90 km
2006	TWIN PEAKS	10,366	75 km
1994	MILFORDBEN	10,338	92 km
1995	MILFORD PASS	10,140	85 km
2006	OAK CITY	9,914	99 km
1998	GEORGE	8,054	73 km
2019	FALL RX 2019 LANGDON/BIG TABLE/COLLINS/SMITH CYN	7,851	17 km
2000	SWAINS	7,450	68 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	25°F (-4°C)	0.9 in
February	25°F (-4°C)	1.1 in
March	30°F (-1°C)	1.2 in
April	36°F (2°C)	1.0 in
May	44°F (7°C)	1.2 in
June	53°F (12°C)	0.9 in	Driest
July	66°F (19°C)	1.5 in	Warmest
August	60°F (16°C)	1.8 in	Wettest
September	53°F (12°C)	1.5 in
October	43°F (6°C)	1.2 in
November	32°F (-0°C)	1.1 in
December	24°F (-4°C)	1.1 in	Coldest

Koosharem has a seasonal temperature swing of 42°F / from 24°F in December to 66°F in July. Total annual precipitation is 14.4 inches, with August being the wettest month (1.8") and June the driest (0.9").

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